But I wasn't arguing that banking legacy systems are better than Lightning. I was comparing Lightning to L1s.
There is a range where node count is strongly decentralized and enough to escape any capture. Every additional node going beyond this range brings quickly diminishing returns. The number is not 1 node, but it's not every single user running a node either.
Was Bitcoin not decentralized a few years ago because it had less nodes? Is it not decentralized now because it will have more nodes in a few years?